Which rule requires a pre-trial notice when the prosecutor intends to introduce evidence of other crimes and the defendant requests the notice?

• A. Adjudicative Proceeding
• B. 404(b)
• C. Affinity
• D. Affidavit

Answer: (B)

Rule 404(b) covers evidence of other crimes or acts and sets the framework for when such evidence may be admitted. It allows extraneous-offense evidence for purposes like motive, opportunity, intent, plan, knowledge, identity, or absence of mistake, but it also guards against unfair prejudice by requiring proper notice and a careful balancing of probative value versus prejudicial effect. When the defense requests it, the rule requires the prosecutor to provide pre-trial notice that extraneous-offense evidence will be offered, so the defense has time to investigate and prepare, and the court can ensure the evidence is admitted only with appropriate limiting instructions if needed. The other options don’t address evidentiary notice: adjudicative proceedings refer to types of hearings, affinity is unrelated, and an affidavit is a sworn statement rather than a rule about notice for other-crimes evidence.